CN101787534A - BE rust inhibitor based method and device for restoring electroosmotic salt polluted buildings - Google Patents
BE rust inhibitor based method and device for restoring electroosmotic salt polluted buildings Download PDFInfo
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- CN101787534A CN101787534A CN 201010137745 CN201010137745A CN101787534A CN 101787534 A CN101787534 A CN 101787534A CN 201010137745 CN201010137745 CN 201010137745 CN 201010137745 A CN201010137745 A CN 201010137745A CN 101787534 A CN101787534 A CN 101787534A
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Abstract
The invention relates to BE rust inhibitor based method and device for restoring electroosmotic salt polluted buildings. The invention is characterized in that the method mainly comprises the following steps of: (1) setting a rust inhibitor-electrolyte maintaining and circulating system on the building surface; (2) injecting the BE rust inhibitor and the electrolyte into the rust inhibitor-electrolyte maintaining and circulating system; (3) arranging an anode in the rust inhibitor-electrolyte maintaining and circulating system; (4) connecting the anode with a positive electrode of a direct current power supply, and connecting a negative electrode of the power supply with a reinforced steel bar in the building; controlling the current density, and continuously energizing until the BE rust inhibitor effective groups are enriched in the vicinity of the reinforced steel bar in the restored concrete and a protecting film is formed on the surface of the reinforced steel bar. The invention has the effect for discharging chloride ions under the action of the electric field, and has the advantages of simplicity, easy operation, long restoring protection period, low cost and good effect.
Description
Technical field
The present invention relates to a kind of restorative procedure and device of salt pollution structures, especially a kind of electric osmose restorative procedure of salt pollution buildings, specifically a kind of based on restorative procedure and device with BE rust inhibitor electric osmose salt pollution structures.
Background technology
The repairing of salt pollution concrete structure is global eldest child's difficult problem.It is more much more difficult than the repairing of the concrete structure of carbonization; though causing steel reinforced concrete erosion destroys; no matter be carbonization and salt pollution; it all is the galvanic corrosion of the steel in the concrete; but the electrochemical characteristic of having nothing in common with each other; the resistivity of carbonated concrete is higher; constitute the macroscopic view of this galvanic corrosion; the microcosmic galvanic couple all is confined in the corrosion scope; mended; whole galvanic couple has not all had; just can obtain secular protection effect; and the concrete resistivity of salt pollution is low, and what dominate galvanic corrosion is macroscopical couple action, and the reinforcing bar that shows as corrosion failure mainly is the positive column of macroscopical galvanic couple; its corrosion reinforcing bar that the salt pollution beyond the sectional repair scope is gentlier located to constitute the cathodic area of macroscopical galvanic couple works to do sacrificial anode just, thereby makes the reinforcing bar around its accept galvanic protection.In case being burst harm, original rust carried out sectional repair; just no longer reinforcing bar is on every side played the galvanic protection effect; and the muriate in the concrete around it still exists; thereby certainly will form new galvanic couple; there; the lighter reinforcing bar of original corrosion becomes new positive column again, can accelerated corrosion.
For these reasons, to the reparation of the concrete structure of salt pollution, existing engineering method or comprehensively cut corrosion thing on the thorough removing reinforcing bar is built protective layer again with quality concrete.Perhaps take electro-chemical protection, electro-chemical protection method in the past comprises cathode protection method and electrochemical desalination process, shortcoming such as is difficult to carry out, uneconomical but all exist.Coming the reinforcing bar of passivation corrosion with concrete surface coating migration-type rust inhibitor solution at present has been the problem of being concerned about both at home and abroad; but salt pollution skeleton construction for a large amount of protection bed thickness; common migration-type rust inhibitor is difficult to infiltrate into rebar surface, thereby is difficult to carry out.Though electrochemical desalination process can be implemented in the skeleton construction of repairing the salt pollution corrosion failure effectively, remain in the duration longer, problem such as long-term effect is not ideal enough.Can cause alkali-aggregate reaction in construction time and reduce the bond stress of reinforcing bar and cause problem such as hydrogen embrittlement, the problem that exists the desalination terminal point to determine not too easily in addition. to the reparation and the maintenance of the skeleton construction of salt pollution corrosion failure, even to developed country, also be a heavy economical load, only in the U.S., every year is considered that up to tens billion of dollars indirect loss will be more than hundred billion dollars in the salt pollution skeleton construction brings loss.
Name had once been declared by Nanjing Amy human relations this scientific and technological development company limiteds, and to be called " Infitration type rust inhibitor and electroosmosis method thereof ", application number be 00134393.9 patent of invention, use therein rust inhibitor (is the BE rust inhibitor, molecular formula is as follows) relate to the aromatic derivant of a class thanomin, with a kind of mineral acid the aromatic derivant of thanomin being neutralized to pH value is 7 ammonium salt, this ammonium salt is cationic, and wherein the general formula of the aromatic derivant of thanomin is as follows:
R in the formula
1=H or OH R
2=H or C
1-C
9Alkyl
The electric osmose degree of depth of BE rust inhibitor under electric field action and resistance rust effect are not only far above naturally osmotic, and under equal battery condition, also far above the simple desalting treatment of common employing.In the electric osmose treating processes, the cationic resistance rust group of rust inhibitor is fast to the inside concrete migration in the concrete, and when rebar surface formed protective membrane, electronegative chlorion moved to the outside in the concrete, has also reached the effect of concrete desalination.Like this, electric osmose BE rust inhibitor had both taken off salt, had increased the protective layer that resistance rust group forms again, killed two birds with one stone.Present method is different from makes the electrochemical desalting constructional method of chlorion to external migration merely, under certain condition, can avoid or reduce may exist in other electrochemical process for treating to concrete negative impact, as degradation unfavorable factor under alkali, hydrogen embrittlement, the reinforcing bar-concrete interface bonding strength, and can prolong the lasting life-span of resistance rust usefulness greatly.Can form a kind of brand-new constructional method that all kinds of engineerings are repaired that is widely used in fully.People's some migration-type rust inhibitor on probation was also once arranged in the tentative electric osmose technology of testing laboratory abroad, but do not obtain resistance rust effect, and our BE rust inhibitor under suitable electric field action, can enter concrete very effectively.The present invention is in recent years on the basis of a large amount of experimental studies and practice, has obtained many new parameters, adopts anode material, closed circulation formula rust inhibitor and the electrolysis maintenance system etc. of new cheapness to be adapted to the method for big area engineering construction.Superiority on its Technological Economy is that other engineering construction method is unapproachable at present.The technology of naturally osmotic and existing electrochemical desalting be can replace, the various Infrastructure and the structures of a large amount of salt pollutions repaired, low cost, high-level efficiency has great innovative significance, has solved this global difficult problem.
Summary of the invention
It is big to the objective of the invention is the difficulty of construction that exists at existing salt pollution buildings restorative procedure, the cost height, and easily problem such as recurrence is invented a kind of restorative procedure and device based on usefulness BE rust inhibitor electric osmose salt pollution structures.
Technical scheme of the present invention is:
A kind of based on restorative procedure with BE rust inhibitor electric osmose salt pollution structures, it is characterized in that it may further comprise the steps
1) maintenance, the recycle system of rust inhibitor-electrolytic solution are set on the structures surface;
2) inject maintenance, the recycle system of injecting described rust inhibitor-electrolytic solution behind the BE rust inhibitor in electrolytic solution, rust inhibitor content is 3%～30% volume percent; The concentration of above-mentioned rust inhibitor should be according to decisions such as concentration, reinforcing bar total surface area and the extent of corrosion of chlorion in the concrete, thickness of concrete cover;
3) place described rust inhibitor-electrolytic solution maintenance system with reinforcing mat, platinized titanium or MMO net as anode material;
4) described anode material is linked to each other with the positive pole of direct supply, and begin electric osmose after the reinforcing bar in the negative pole of direct supply and the structures or reinforcing mat linked to each other, be i.e. energising and control current density continuously.The value of current density is counted 0.6～3A/m with reinforcing bar in the protected structures or reinforcing mat total surface area
2, total electric weight of energising is calculated as 200-2000Ah/m with the total surface area of reinforcing bar in the protected structures or reinforcing mat
2Until near enrichment reinforcing bar or the reinforcing mat in structures of BE rust inhibitor effective constituent, simultaneously, make near the outside electric osmose of villaumite reinforcing bar in the structures or the reinforcing mat, cause rebar surface passivation sign again to occur.Can finish energising this moment.
Described electrolytic solution is Ca (OH)
2, LioH, NaCO
3, the aqueous solution such as NaOH.
In reinforcing bar in the described structures or the reinforcing mat reinforcing bar again passivation be meant near reinforcing bar or the reinforcing mat that the effective group of rust inhibitor is compared with the nitrogen content in employed rust inhibitor-electrolytic solution in nitrogen content in the concrete pore liquid, reach 2～20%.Can in the repair process process, be aided with the monitoring of reinforcement corrosion current potential and corrosion current in case of necessity.
After electric osmose was handled, for preventing that villaumite should carry out coating processing to structures concrete surface to the recontaminate of structures in the surrounding medium, coating material can be chloride-penetration resistance coating, silane coating etc.
The present invention can adopt maintenance, the recycle system that adopts following any rust inhibitor-electrolytic solution according to the construction object:
A kind of maintenance of rust inhibitor-electrolytic solution, the recycle system, it is characterized in that it is mainly by water-absorbing material 4, waterproof membrane 6, plastics expanded metals 3 and press strip 2 are formed, suction has the one side of the water-absorbing material 4 of electrolytic solution directly to contact with the structures surface, waterproof membrane 6 covers on the water-absorbing material 4, plastics expanded metals 3 is fitted on the waterproof membrane 6, press strip 2 is fitted on the expanded metals 3, the system of moulding (or plastic packaging) expansion bolt passes press strip 2, expanded metals 3, impermeable layer 6 and water-absorbing material 4 are fixed in the structures concrete 5, thereby whole electrolytic solution maintenance system is positioned at the surface of structures 5, and the water-absorbing material periphery compresses to prevent seepage, on, able to turn on or off advancing left at following both ends, the earial drainage mouth of pipe.
A kind of maintenance of rust inhibitor-electrolytic solution, the recycle system is characterized in that it mainly is made up of water-retaining cofferdam, and electrolytic solution places the cofferdam, and anode 9 places electrolytic solution, and links to each other by the positive pole of lead with direct supply 7.
A kind of maintenance of rust inhibitor-electrolytic solution, the recycle system, it is characterized in that it mainly is made up of upper flume, lower flume and recycle pump, anode 9 is fixed on concrete surface, and link to each other with direct supply 7 by lead, upper flume is provided with water outlet, and the effusive electrolyte stream of this water outlet is crossed concrete surface, links to each other by connecting tube and recycle pump between upper flume and the lower flume, the electrolytic solution of concrete surface is collected into lower flume and in time is pumped in the upper flume circulation repeatedly so that will flow through.
A kind of maintenance of rust inhibitor-electrolytic solution, the recycle system is characterized in that it mainly is made up of jet apparatus, and the continuous anode jet surface of the nozzle of jet apparatus contains the electrolytic solution of electric osmose rust inhibitor.
A kind of maintenance of rust inhibitor-electrolytic solution, the recycle system, it is characterized in that it mainly is made up of waterproof membrane or cloth and water-absorbing material, and maintenance, the recycle system and the anode material of rust inhibitor-electrolytic solution made the assembling sheet in advance, every assembling sheet is provided with the positive wire joint; To assemble sheet by plastic rivet, press strip, plastic grids etc. during installation and be fixed on the structures surface, each is organized anodic in the sheet and draws lead and should be electrically connected mutually.
For maintenance, the recycle system of above-mentioned various rust inhibitor-electrolytic solution, in the electric osmose treating processes, should make regular check on the concentration and the chlorine ion concentration of the rust inhibitor in this system.In case of necessity, change rust inhibitor-electrolytic solution.
Prove that by simulation test restorative procedure of the present invention under equal conditions compares with electrochemical desalting, effect increases significantly, and particularly long-term effect is more outstanding, and testing data is shown in table 1, table 2.
Beneficial effect of the present invention:
Technology of the present invention, the electric osmose degree of depth of BE rust inhibitor under electric field action in concrete is not only far above the degree of depth of naturally osmotic, and its suppresses the effect of reinforcement corrosion, also far above the effect of desalting treatment merely under the condition that waits the energising amount of common employing.Because in the electric osmose treating processes, electronegative chlorion moves to the outside in the concrete; can reach identical desalting effect; simultaneously, the positively charged ion of rust inhibitor in the concrete (resistance rust group) forms protective membrane also apace to the inside concrete migration at rebar surface.Like this, the electric osmose rust inhibitor had both taken off salt, had increased the protective layer that resistance rust group forms again, killed two birds with one stone, thereby had improved the rebar surface quality of passive film again, had promptly significantly improved the ability of passive film resisting corrosion of chlorine ion again.Present method is different from makes the electrochemical desalting constructional method of chlorion to external migration merely, under certain condition, can avoid or reduce may exist in other electrochemical process for treating to concrete negative impact, as degradation unfavorable factor under alkali, hydrogen embrittlement, the reinforcing bar-concrete interface bonding strength, and can prolong the lasting life-span of resistance rust usefulness greatly.The present invention can be widely used in improving the effect of repairing in the brand-new constructional method of all kinds of engineerings reparations, prolongs the work-ing life of structures.People's some migration-type rust inhibitor on probation was also once arranged in the tentative electric osmose technology of testing laboratory abroad, but do not obtain resistance rust effect, and BE migration-type rust inhibitor of the present invention under suitable electric field action, can enter concrete very effectively.The present invention is on the basis of a large amount of experimental studies and practice, has obtained many new parameters, adopts the anode material of new cheapness, has set up the method that is adapted to the big area engineering construction.Superiority on its Technological Economy is that other engineering method is unapproachable at present.The technology that can replace naturally osmotic and existing electrochemical desalting, repair the various Infrastructure and the structures of a large amount of salt pollutions, the restorative procedure duration of the present invention is short, generally also not influencing structures in the treating processes normally runs, after handling termination, but the long-term maintenance good working order of structures Steel Concrete Maintenance free if necessary, can repeat to implement renovation technique of the present invention after the several years.But the present invention's environmental protection, low cost, the reparation that has solved the salt pollution structures expeditiously except that saving substantial contribution, improves the work-ing life of engineering works, reduces duplicate construction, to energy-conserving and environment-protective, promotes low-carbon economy and has important social effect.
Lower concentration of the present invention; low current; the prolongation electric osmose time restorative procedure of (generally needing about 20 days) helps chlorion to the structures surface transport; improve the effect of repairing; though the electric osmose rust inhibitor forms protective membrane at rebar surface; improved the threshold concentration of reinforcing bar generation corrosive chlorion; but 00134393.9 disclosed electroosmosis method electric osmose time is too short; cause a large amount of chlorions not accumulate in the structures, if the structures long durability is still an adverse factors because of there being time enough to finish migration. use excessive current density easily to cause concrete to produce the crack again.These problems have all obtained solution in the present invention.
Restorative procedure of the present invention is because the anode material that adopts can be ordinary metallic material, therefore the anode material cost can reduce greatly, because the BE rust inhibitor is the environment-friendly materials that toxicity is lower than salt, simultaneously owing to recycle and reduce seepage, the consumption of BE rust inhibitor significantly reduces, and has also reduced material cost from another point of view.Therefore the present invention is a kind of efficient, low-cost, long-life restorative procedure.
Description of drawings
Fig. 1 is one of structural representation of prosthetic device of the present invention.
Fig. 2 be prosthetic device of the present invention structural representation two.
Fig. 3 be prosthetic device of the present invention structural representation three.
Fig. 4 is a repairing effect testing data synoptic diagram of the present invention.
Among the figure: 10 is the clay cofferdam, and 11 for being filled with the electrolytic solution of BE rust inhibitor, and 12 is joint bolt, and 13 is upper flume, and 14 is lower flume, and 15 is the plastic cement sealing rod.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiment one.
A kind of based on the restorative procedure with BE rust inhibitor electric osmose salt pollution structures, it may further comprise the steps:
The first step fixedly installs the reinforcing mat as anode material on the structures surface. and its total basal area should be able to guarantee safety by required electric current, and considers that its corrosion consumes;
Second step was provided with rust inhibitor-electrolytic solution and keeps and/or the recycle system on the structures surface, be covered on the reinforcing mat as anode material, and inject electrolytic solution therein (as Ca (OH)
2, LioH, NaCO
3, the aqueous solution such as the NaOH aqueous solution) and the BE rust inhibitor.The rust inhibitor add-on is 3～30% volume percent, according to concentration, reinforcing bar total surface area, decision conduction time of chlorion in the concrete.During concrete the construction, the first step and second step can exchange, and also can carry out simultaneously.
The system that keeps described electrolytic solution can adopt a kind of in several modes that adopted in the prosthetic device shown in Fig. 1-3; That is:
(1) fixedly installs water-absorbing material at pending concrete surface, the water-absorbing material outside surface covers waterproof membrane or the plastics web plate forms the sealing water space capacity, if inlet and relief outlet conveniently to inject, replenish, to change BE electric osmose rust inhibitor and electrolytic solution, reduce also seepage evaporation.Concrete structure is by water-absorbing material 4, impermeable layer 6, web plate 3 and press strip 2 are formed, suction has the one side of the water-absorbing material 4 of electrolytic solution directly to contact with the structures surface, be marked with the BE rust inhibitor in the electrolytic solution, impermeable layer 6 glands are on water-absorbing material 4, web plate 3 is fitted on the impermeable layer 6, press strip 2 is fitted on the web plate 3, expansion bolt passes press strip 2, web plate 3, impermeable layer 6 and water-absorbing material 4 are fixed in the structures 5, thereby whole electrolytic solution maintenance system is positioned at the surface of structures 5, the water-absorbing material periphery compresses sealing, and the able to turn on or off earial drainage mouth of pipe is left in the bottom.Annotating (letting out) stream mouth of pipe can perforate on the waterproof moisture film, sticks on waterproof moisture film tapping with quick viscose glue.
(2) moisture film that liquid distribution surface vertical at pending concrete or that tilt forms the aqueous solution of BE rust inhibitor is set.The below will be provided with the reflux cycle device of BE rust inhibitor solution.
(3) dash is set and encloses low bank between fields and harvest BE rust inhibitor solution at concrete surface, the surface can cover plastic film to reduce evaporation.
(4) contain the pasty state filamentary material of BE rust inhibitor solution with the jet apparatus spraying on the concrete surface, and replenish the BE rust inhibitor aqueous solution therein.
The 3rd step linked to each other anode with the positive pole of direct supply, and the negative pole of direct supply is linked to each other with reinforcing bar in the structures; Described power source voltage is no more than 50V; Control current density; energising continuously; carry out electric osmose; will as the effective resistance rust group of cationic electric osmose type rust inhibitor BE move to as the rebar surface of negative electrode and near; form protective membrane (promptly finishing passivation) at rebar surface; electronegative chlorion moves to the outside in the concrete, prolongs concrete (being structures of the present invention, the down together) purpose in work-ing life to reach the protection reinforcing bar.Passivation sign again is to compare in the nitrogen content of comparing in the effective group of rust inhibitor (with nitrogen content) near the concrete pore liquid concrete reinforcing steel and the rust inhibitor-electrolytic solution to reach 2～20% level, as control criterion.Current density during electric osmose in the total surface area of protected reinforcing mat in the concrete, is 0.6～3A/m
2Also must make total electric weight reach prescribed value in the galvanization, total electric weight is calculated as 200-2000Ah/m with the total surface area of reinforcing bar in the protected structures or reinforcing mat
2Calculate.
Electric osmose is continued salt pollution for preventing structures after handling, and to prolong the useful life phase that electric osmose resistance rust is handled, the reply concrete surface carries out coating processing, and coating material can be resisting chloride ion penetration hydrophobic coating, silane coating etc.
Prove that by simulation test restorative procedure of the present invention compares with the electrochemical desalting that waits displacement flux, effect increases significantly, and particularly long-term effect is more outstanding.Process of the test is that 3%NaCl solution is stored in Steel Concrete test specimen end face 3d (3 days), in baking oven (50 ℃), dry by the fire 3d (3 days) again, so repeatedly, measure the corrosion potential of reinforcing bar, less than till-the 350mv, make steel bar corrosion until potential value, by four groups of different situations shown in the table 1 test specimen is handled then, detect the reinforcing bar rate of weight loss after 1 year, testing data is as shown in table 2.
Table 1
| Group | First group | Second group | The 3rd group | The 4th group |
| System | Blank, non-processor | Naturally oozed rust inhibitor 20 days | Electric osmose rust inhibitor current density is 2.5A/m 220 days | Desalination, no rust inhibitor current density 2.5A/m 220 days |
Table 2 rate of weight loss result
Annotate 1: the average annual rate of weight loss of corrosion rate=(the average annual rate of weight loss of the average annual rate of weight loss-activation aftertreatment group of the blank group in activation back) blank group in ÷ activation back
Annotate 2: the corrosion rate of resistance rust rate=(the corrosion rate of the corrosion rate-activation aftertreatment group of the blank group in activation back) blank group in ÷ activation back
Detection by 56 all corrosion resistances and corrosion potential has also proved its long-term effect of BE rust inhibitor electric osmose to above four groups of test specimens, far above the treatment effect of electrochemical desalting, on average the time course line of steel bar corrosion speed and semi-invariant in time are as shown in Figure 4:
Detected result by corrosion resistance and corrosion potential has also proved BE rust inhibitor electric osmose long-term effect, and far above the treatment effect of electrochemical desalting, the time course line of average steel bar corrosion speed and semi-invariant in time are as shown in Figure 4.
Embodiment two.
A kind of based on the electric osmose restorative procedure with BE rust inhibitor electric osmose salt pollution structures, it may further comprise the steps:
The first step is made flexible absorbent material and anode metal (can adopt in reinforcing mat, stainless steel, copper, platinized titanium and the MMO net grid any) bonded and is assembled sheet.The assembling sheet is moulded net by waterproof membrane (cloth), suction material (non-woven fabrics, sponge, foam material etc.), flexibility and the anode metal material is through and moulds in the net. with plastic rivet, press strip, plastic grids etc. the flexible sheet of assembling of anode is fixed on the concrete surface.Every flexible assembling sheet is provided with the anode material pigtail splice.
In second step, in above flexible absorbent material and anode metal bonded assembling sheet, inject electrolytic solution (as Ca (OH)
2, LioH, NaCO
3, the aqueous solution such as the NaOH aqueous solution) and the BE rust inhibitor.The rust inhibitor add-on is the volume percent of 3-30%, according to concentration, reinforcing bar total surface area, decision conduction time of chlorion in the concrete.
In the 3rd step, anode of each assembling sheet is linked to each other with the positive pole of direct supply, and the negative pole of direct supply is linked to each other with reinforcing bar or reinforcing mat in the structures; Described power source voltage is no more than 50V; Control current density; continuous energising electric osmose; will as the effective resistance rust group of cationic electric osmose type rust inhibitor BE move to as the rebar surface of negative electrode and near; form protective membrane at rebar surface; electronegative chlorion moves to the outside in the concrete; prolong the concrete purpose in work-ing life to reach the protection reinforcing bar; compare in the effective group of rust inhibitor (with nitrogen content) near the concrete pore liquid concrete reinforcing steel and the rust inhibitor-electrolytic solution conduction time; 2～20% the level of reaching is a control criterion; described current density; in the total surface area of protected reinforcing mat in the concrete, be 0.6～3A/m
2Surplus with embodiment one.
Embodiment three.
The difference of present embodiment and embodiment one, two is that rust inhibitor-electrolytic solution keeps the recycle system mainly to be made up of upper flume, lower flume and recycle pump, anode material is fixed between upper flume and the lower flume and by lead and links to each other with direct supply 7, upper flume is provided with water outlet, the effusive electrolytic solution of this water outlet is cast in the surface of anode material, link to each other by connecting tube and recycle pump between upper flume and the lower flume, so that the rust inhibitor and the electrolyte stream of upper flume are fallen into lower flume behind anode surface, in time be pumped in the upper flume, repeatedly circulation.Surplus with embodiment one.
Embodiment four.
The difference of present embodiment and embodiment one, two is that described rust inhibitor-electrolytic solution keeps, the recycle system mainly is made up of jet apparatus, and the continuous anode jet surface of the nozzle of jet apparatus contains the electrolytic solution of migration-type rust inhibitor.Surplus with embodiment one.
In the foregoing description one to embodiment four, described anode material must keep insulation with concrete reinforcing steel.Total electric weight of electric osmose energising calculates with protected reinforcing bar total surface area, is 200～2000Ah/m
2Scope, concrete numerical value is decided by thickness of concrete cover and residual usage period length of engineering and salt pollution degree.
Example.
Certain coastal tide sluice, thickness of concrete cover 5cm, water cement ratio 0.5, the about 1.6m of reinforcing bar total surface area
2, the gate pier corrosion state: reinforcing bar rust mistake rate average out to about 6%, the concrete surface many places present remarkable rusty stain.BE rust inhibitor electric osmose is handled and adopted current density is 1.2A/m
2,, BE rust inhibitor concentration 7.5%.Anode material is the mesh grid of 3mm diameter wire, and screen distance 5cm switched on 25 days, and total electric weight reaches 720Ah/m
2, drilling through the concrete powder sample after 2 months, BE rust inhibitor concentration (in nitrogen content) is 3.5 ‰ near the hole liquid of reinforcing bar, is 10.5% of nitrogen concentration in rust inhibitor-electrolytic solution, and reinforcing bar has been in passive state, and the chlorion decreasing ratio reaches more than 60% in the concrete.Electric osmose is handled back concrete surface silane coating coating.By current repair process, estimate that protection period can prolong more than 30 years.
In addition, the applicant is undertaken finding after the electric osmose by the adding proportion that changes anode material, current density, BE rust inhibitor to similar many structures, as long as appropriate change conduction time, can make near the nitrogen content ratio that is repaired the structures reinforcing bar reach 2-20%, meet the reparation requirement fully.For a person skilled in the art, can adjust relevant construction parameter voluntarily with concrete pollution level according to parameter provided by the present invention, so enumerate no longer one by one.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (8)
1. the restorative procedure based on usefulness BE rust inhibitor electric osmose salt pollution structures is characterized in that it may further comprise the steps
1) maintenance, the recycle system of rust inhibitor-electrolytic solution are set on the structures surface;
2) annotate the BE rust inhibitor in electrolytic solution, inject maintenance, the recycle system of described rust inhibitor-electrolytic solution then, rust inhibitor content is 3%～30% volume percent;
3) place described rust inhibitor-electrolytic solution maintenance system with reinforcing mat, platinized titanium or MMO net as anode material;
4) described anode material is linked to each other with the positive pole of direct supply, and the negative pole of direct supply is linked to each other with reinforcing bar or reinforcing mat in the structures, begin energising and control current density continuously then.The value of current density is counted 0.6～3A/m with reinforcing bar in the protected structures or reinforcing mat total surface area
2Total electric weight of energising is calculated as 200-2000Ah/m with the total surface area of reinforcing bar in the protected structures or reinforcing mat
2, the rust inhibitor effective constituent electric osmose in rust inhibitor-electrolytic solution is gone in the structures, and near enrichment reinforcing bar therein or the reinforcing mat; Meanwhile, make near the outside electric osmose of villaumite reinforcing bar in the structures or the reinforcing mat, and in the structures concrete, outwards take off and be discharged in rust inhibitor-electrolytic solution, cause rebar surface to present passivation sign again, finish energising this moment.
2. according to claim 1 based on restorative procedure with BE rust inhibitor electric osmose salt pollution structures, it is characterized in that described electrolytic solution is Ca (OH)
2, LioH, NaCO
3, the aqueous solution such as NaOH.
3. the restorative procedure based on BE rust inhibitor electric osmose salt pollution structures according to claim 1, it is characterized in that near the enrichment BE rust inhibitor effective constituent of reinforcing mat in the described structures, reinforcing bar presents passivation sign again in reinforcing bar or the reinforcing mat, is meant near reinforcing bar or the reinforcing mat that the effective group of rust inhibitor is compared with the nitrogen content in employed rust inhibitor-electrolytic solution in nitrogen content in the concrete pore liquid to reach 2～20%.
4. the maintenance of the rust inhibitor-electrolytic solution of the described restorative procedure use of claim 1, the recycle system, it is characterized in that it is mainly by water-absorbing material (4), waterproof membrane (6), plastics expanded metals (3) and press strip (2) are formed, suction has the one side of the water-absorbing material (4) of electrolytic solution directly to contact with the structures surface, waterproof membrane (6) covers on the water-absorbing material (4), plastics expanded metals (3) is fitted on the waterproof membrane (6), press strip (2) is fitted on the expanded metals (3), the system of moulding (or plastic packaging) expansion bolt passes press strip (2), expanded metals (3), impermeable layer (6) and water-absorbing material (4) are fixed in the structures concrete (5), thereby whole electrolytic solution maintenance system is positioned at the surface of structures (5), and the water-absorbing material periphery compresses to prevent seepage, on, able to turn on or off advancing left at following both ends, the earial drainage mouth of pipe.
5. maintenance, the recycle system of rust inhibitor-electrolytic solution of using of the described restorative procedure of a claim 1, it is characterized in that it mainly is made up of water-retaining cofferdam, electrolytic solution places the cofferdam, and anode (9) places electrolytic solution, and links to each other by the positive pole of lead with direct supply (7).
6. maintenance, the recycle system of rust inhibitor-electrolytic solution of using of the described restorative procedure of a claim 1, it is characterized in that it mainly is made up of upper flume, lower flume and recycle pump, anode (9) is fixed on concrete surface, and link to each other with direct supply (7) by lead, upper flume is provided with water outlet, the effusive electrolyte stream of this water outlet is crossed concrete surface, link to each other by connecting tube and recycle pump between upper flume and the lower flume, the electrolytic solution of concrete surface is collected into lower flume and in time is pumped in the upper flume circulation repeatedly so that will flow through.
7. maintenance, the recycle system of rust inhibitor-electrolytic solution of using of the described restorative procedure of a claim 1 is characterized in that it mainly is made up of jet apparatus, and the continuous anode jet surface of the nozzle of jet apparatus contains the electrolytic solution of electric osmose rust inhibitor.
8. maintenance, the recycle system of rust inhibitor-electrolytic solution of using of the described restorative procedure of a claim 1, it is characterized in that it mainly is made up of waterproof membrane or cloth and water-absorbing material, and maintenance, the recycle system and the anode material of rust inhibitor-electrolytic solution made the assembling sheet in advance, every assembling sheet is provided with the positive wire joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101377454A CN101787534B (en) | 2010-04-02 | 2010-04-02 | BE rust inhibitor based method and device for restoring electroosmotic salt polluted buildings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101377454A CN101787534B (en) | 2010-04-02 | 2010-04-02 | BE rust inhibitor based method and device for restoring electroosmotic salt polluted buildings |
Publications (2)
| Publication Number | Publication Date |
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| CN101787534A true CN101787534A (en) | 2010-07-28 |
| CN101787534B CN101787534B (en) | 2011-05-04 |
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| CN2010101377454A Expired - Fee Related CN101787534B (en) | 2010-04-02 | 2010-04-02 | BE rust inhibitor based method and device for restoring electroosmotic salt polluted buildings |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627473A (en) * | 2012-04-27 | 2012-08-08 | 浙江大学宁波理工学院 | Device and method for repairing concrete structure damaged by salt through two-step process |
| CN102653990A (en) * | 2012-04-27 | 2012-09-05 | 广厦建设集团有限责任公司 | Bidirectional electroosmosis repairing method of corrosive concrete structure |
| CN104480521A (en) * | 2014-12-30 | 2015-04-01 | 深圳大学 | Method and device for accelerated corrosion of steel bars in gas-liquid circulation type reinforced concrete |
| CN105925989A (en) * | 2016-06-22 | 2016-09-07 | 苏交科集团股份有限公司 | Electrochemical antiseptic device using latticed titanium anode and protection device |
| CN106676540A (en) * | 2017-01-05 | 2017-05-17 | 浙江大学宁波理工学院 | Method for inhibiting hydrogen brittleness of reinforced concrete structure during electric dechlorination |
| CN107974684A (en) * | 2017-11-07 | 2018-05-01 | 浙江大学宁波理工学院 | A kind of sunpender to arched bridge pre-stressed boom carries out the device that electricity moves dechlorination |
| CN109812048A (en) * | 2019-04-10 | 2019-05-28 | 北京中科行运科技有限公司 | A kind of Electrotransport devices of concrete top facade structures |
| CN112981414A (en) * | 2019-12-17 | 2021-06-18 | 江苏苏博特新材料股份有限公司 | System and method for repairing salt-eroded reinforced concrete through staged electrochemistry |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627473A (en) * | 2012-04-27 | 2012-08-08 | 浙江大学宁波理工学院 | Device and method for repairing concrete structure damaged by salt through two-step process |
| CN102653990A (en) * | 2012-04-27 | 2012-09-05 | 广厦建设集团有限责任公司 | Bidirectional electroosmosis repairing method of corrosive concrete structure |
| CN102627473B (en) * | 2012-04-27 | 2013-07-24 | 浙江大学宁波理工学院 | Device and method for repairing concrete structure damaged by salt through two-step process |
| CN104480521A (en) * | 2014-12-30 | 2015-04-01 | 深圳大学 | Method and device for accelerated corrosion of steel bars in gas-liquid circulation type reinforced concrete |
| CN105925989A (en) * | 2016-06-22 | 2016-09-07 | 苏交科集团股份有限公司 | Electrochemical antiseptic device using latticed titanium anode and protection device |
| CN106676540A (en) * | 2017-01-05 | 2017-05-17 | 浙江大学宁波理工学院 | Method for inhibiting hydrogen brittleness of reinforced concrete structure during electric dechlorination |
| CN107974684A (en) * | 2017-11-07 | 2018-05-01 | 浙江大学宁波理工学院 | A kind of sunpender to arched bridge pre-stressed boom carries out the device that electricity moves dechlorination |
| CN107974684B (en) * | 2017-11-07 | 2019-06-18 | 浙江大学宁波理工学院 | The sunpender of a kind of pair of arched bridge pre-stressed boom carries out the device that electricity moves dechlorination |
| CN109812048A (en) * | 2019-04-10 | 2019-05-28 | 北京中科行运科技有限公司 | A kind of Electrotransport devices of concrete top facade structures |
| CN112981414A (en) * | 2019-12-17 | 2021-06-18 | 江苏苏博特新材料股份有限公司 | System and method for repairing salt-eroded reinforced concrete through staged electrochemistry |
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